Pet shelter



FIG. 1 is a perspective view of a pet shelter;

FIG. 2 is a left side elevational view, the right side elevational view being a mirror image thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevation view thereof; and,

FIG. 5 is a rear elevation view thereof. 

The ornamental design for a pet shelter, as shown and described. 